<!DOCTYPE html>

<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
         <a href="index.php">POST</a>
        <a href="index2.php">GET</a>
        <hr/>
        <form  action="exe.php" method="POST">
          圆环的数量:<input type="text" name="c" /><br/>
          起始圆的直径:<input type="text" name="h" /><br/>
          步长:<input type="text" name="r" /><br/>
          <input type="submit" value="提交"/>
          <input type="reset" value="取消"/>
        </form>
        <?php
        // put your code here
        ?>
    </body>
</html>
